Grinding-mill.



No. 655,805. Patented Aug. l4, I900.

L. 0. SHELLABABGER.

GRINDING MILL.

(Application filed July 24, 1899.)

(No Model) 2 Sheets-Sheet 1 7206712? attest Q. HEELABABQiEB,

hisodct Patented Aug. l4, I900.

Sheets-Sheet 2 L. C. SHELLABABGER. GRINDING MILL. A uc eion filed July24, 1899.)

(No Model.)

REFER,

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PATENT Prion.

LUCIEN C. SI-IELLABARGER, OF DECATUR, ILLINOIS.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 655,805, dated August14,1900.

Application filed July 24, 1899.

To all whom it may concern:

Be it known that I, LUOIEN O. SHELLABAR- GER, of the city of Decatur,county of Macon, and State of Illinois, have invented certain new andusefullmprovements in Mills for Breaking, Degerminating, and SecuringOereals, of which the following is a specification.

My invention is particularly applicable to It is exemplified in thestructure hereinafter described, and it is defined in the appendedclaims.

In the drawings forming part of this specification, Figure 1 is aperspective representation of a feeding-cone, a discharge-cone, and aninterposed cylinder. Fig. 2 is a perspective representation of theconical discharge-controller. Fig. 3 is a vertical section through theshell and frame of a mill, showing the cylinder and dischargecontrollerbroken away to expose details therein. Fig. at is a transverse sectionon line 00 in Fig. 3. Fig. 5 is a plan of the discharge-pan, the shaftand the hub of the discharge-controller being shown in cross-section online Y in Fig. 3. Fig. 6 is a plan of the top of the mill.

The mill is of the vertical type, and the breaking, degerminating,scouring, or grinding mechanism comprises a cylinder and a shellconstructed in any desirable manner and provided with suitableroughened, protuberant, or corrugated surfaces. In this instance thecylinder 1 is corrugated and the shell or concave 13 hasinwardlyextending protuberances, preferably of conical shape; but thismay be varied to suit different re quirements. On the upper end of thecylinder is fixed or formed a cone 2, which is provided with feed-wings3, which are fixed on the cone, with their extended sides inclinedforward or in the direction of the rotation of the cylinder and cone.described geometrically as right-angled triangles, with theirhypotenuses in contact with the cone 2, their sides in a horizontalplane coincident with the top of the cone, and their bases extendedbeyond the periphery of the cylinder. The corners of the wings are cutoff or omitted at the conjunction of the cone with the cylinder, and theupper corners are inclined forward, as shown and described. This is thepreferred form; but I do not confine myself to geometrically-accu- Thewings may be Serial No. 724,984. (No model.)

rate construction, and the form and disposal of the wings may be variedsomewhat without departing from the essential peculiarities defined inthe claims. It is the function of the cone to provide inclines downwhich the cereal to be treated may travel to the space between thecylinder and the shell, and it is the purpose of the wings to force thecereal downward and outward by inclined-plane action beyond the base ofthe cone. real is supplied to the upper end of the machine above thecone, the shaft 4 is rotated in the direction indicated by arrows in thedrawings, carrying the cylinder and the cone with it,and the feeding iseffected as described.

The discharge from the cylinder is controllable, so that the cereal maybe submitted to the action of the cylinder and shell for the timerequired to produce best results, and the means employed to control thedischarge are embodied in a frustum of a cone 5, which ro-- tates withshaft 4 and is vertically shiftable thereon, and an annular bearing inthe bottom of the mill with which the cone coacts to form a variablepassage-way. The cone 5 is splined onto shaft 4, and its weight ispreferably sustained bysprings, as 11 in Fig. 3 ,which are in thisinstance connected with the spider 32 of the cylinder and the spider ofthe cone. The inner lower edge of the base-plate 15 of the shell ischamfered, as shown at 16,-

forming an annular bearing-surface opposed to the upper surface of cone5 and diverging slightly downward from such surface. The frustum 5 hason its diminished end a vertical ring 8, which fits inside the lower endof the grinding-cylinder, and a circumferential rib or ribs, as 9 inFig. 2, are formed on the outer surface of the ring. The cone 5 also hasribs, as 6, on its upper surface, the pur pose of which is to preventthe crushed cereal discharged over the cone from becoming packed in thedischarge-passage, and they are preferably disposed with their upperends in advance of their lower ones. The purpose of the circumferentialrib or ribs 9 is to prevent dust from accumulating and packing in thespace between the ring 8 and the adjacent inclosing wall of thecylinder, and'the vertical motion of the ring is relied on to keep thespace clear through the agitation imparted to the rib. The cone 5 has adownward The ce-' extended sleeve 7, through which it is splined to theshaft, and an adj Listing-lever 18 connects with a collar 17 below it ina manner to provide vertical adjustment for the cone. Anantifriction-collar 17 is placed between the collar 17 and the sleeve.One end of the lever is fulcrumed on a rod 19, which depends from a lug23 of the base-plate of the grinding-shell, and the other end ispivotally connectcd with a rod 20, which extends upward through anopening in lug 24 of the baseplate of the grinding-shell. The upper endof rod 20 is threaded and provided with a finger-nut 21, and between thefinger-nut and the lug is placed a compression-spring 22. The purpose ofthe lever, the adjusting-rod, and the nut is to vary the approach of thecone toward the bearing 16 of the plate 15, and the purpose of thespring is to aid in effecting such adjustment and to make the positionsyielding and to some extent automatically adjustable. The dischargepassage-way extends entirely around the bottom of the mill, givingclearance on all sides and obviating the useless expenditure of forceapplied to dragging the stock to an opening placed in some particularlocation and the injurious effect on the stock incident to such draggingor forcing. The space is kept sufficiently large to permit freedischarge of properly-treated stock and small enough to retain the stockuntil it is properly treated. The tendency of the feeding-wings is toforce the stock through the mill, a tendency to which gravitycontributes, and the spring 22 is made to yieldingly resist thispressure with just enough force to produce the required result, closingup the discharge space when the quantity of stock in the mill becomesreduced and enlarging it when an accumulation of stock requires suchaction. When the stock passes from the grinding-compartment, it fallsinto a pan 30, which has an opening 31, as shown in Fig. 5, which maycommunicate with a chute. A scraper 12 is formed on the bottom of cone5, as suggested in Fig. 3, or fastened to the sleeve of the cone, asshown in Fig. 5, and the'function of such scraper is to force the stocktoward outlet 31.

The details of construction of the mill apart from the novel featuresspecifically claimed are not essential; but I prefer to make them asshown in the drawings, where two grinding-spaces and tworelieving-spaces are alternated. The grindingsurfaces of the cone areformed on plates attached to a cylinder 1 and the cylinder is mounted onthe shaft 4 through a spider 32. Four posts 36 rise from the base-plate15 and divide the exterior of the frame into four equal spaces.

In two opposite spaces plates 14 are set and connected with the posts byadjusting-bolts, and on the inner surfaces of the plates are fastenedgrinding-plates 13, preferably supplied with inward-extended conicalprotuberances. In the other spaces between posts are placed perforatedplates 37, through which a part of the stock treated in the grindingcompartment next preceding may pass. These perforated plates are alsoconnected with the posts by means of adjusting-bolts, and from theirframes vertical ribs 33 extend outward to form side walls ofpassage-ways for the stock escaping through the perforations. Tocomplete such passage-ways, imperforate plates 34 are fastened to theouter surfaces of ribs 33 and openings 35 are formed in the base-plate.Legs 29 are used to support the mill at proper height, and the upper endof the mill is inclosed by ring 25 and disk 26, which is fastened to thering through lugs 27 and which has an inlet-opening 26. On the disk 26is mounted a bracket 28, which forms a bearing in which the upper end ofshaft 4 is journaled, and another bearing for the shaft is formed in thelower end of the frame. The disk 26 may be placed in different positionson the mill, so as to vary the relative location of the inlet-opening,and the same is true of pan 30 with reference to the discharge-openin g.

WVhat I claim is- 1. A mill for treating cereals, comprising a verticalconcave or casing, a vertical shaft concentric with the casing, acylinder fixed on the shaft, a conical valve below the cylinder turningwith the shaft and having free motion lengthwise thereof and aspring-support for the valve, whereby the space between the valve andthe casing depends on the re lation of the downward pressure of thecereal to the upward pressure of the spring and the rotation of thevalve distributes circumferentially.

2. A mill for treating cereals comprisinga vertical concave or casing,avertical shaft concentric with the casing, a cylinder fixed on theshaft, a conical valve below the cylinder splined on the shaft to rotatetherewith and having vertical motion thereon and springs connected withthe cylinder and with the valve to approximately sustain the valve.

In testimony whereof I sign my name in the presence of two subscribingwitnesses.

LUOIEN O. SHELLABARGER.

Witnesses:

WM. T. CUssINs, L. P. GRAHAM.

